According to First Finance, on December 8, after Hefei launched the “Second-hand Housing Swap” service, there are already 78 housing units awaiting replacement on the Hefei Stock Housing Replacement Service Platform. The listing time is from December 5 to 9. Each set has its own housing verification code to ensure that the property rights are real. A second-hand housing swap is a two-way transaction in which the owners of two houses exchange houses for the same or difference in price.